Grinding device.



GfA. SWEET.

v GRINDING DEVICE.

^ APPUCTON FlLED MAR. 28, 1916. 1,199,836. Patented Oct. 3,1916.

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Wneooeo G. A. SWEET.

GRINDING DEVICE.

' APPLICATION FILED MAR. 28| 96- l 1,1 99,836; Patented Oct. 3,1916.

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Taall fwtom t may concern:

Be it known .that I, GEORGE A, SWEET, a citizenvof the United States,residing at` Ashtabula, in the county of Ashtabula and State "`of Ohio,have invented new and useful vImprovements 4in Grinding Devices, ofwhich,

the following is a specification.

This invention contemplates the provision ofl a grinding deviceespeciallyintended for usein connection' with a leatherl splittingmachine, although susceptible fory use in other connections. v

In machines of the above mentioned character the cutting blade is in thenature of a continuousband trained over pulleys to travel ataconsiderably high rate of speed, in view of which fact the blade must bereasonably soft to make the turns. lThe present .method of sharpeningthese bands resides in passing the bands between a pair of rapidlyrevolving grinding wheels, which provides the band with a rough andltender edge, that does more or less damage and inferior work. With theband in this condi tion the'cutting edge' is often turned over by theshot or thorns frequently found in hides, vthereby rendering the hidebeyond repair. Considerable time is also spent in grinding the breaksout of the band, with a resultant waste of the latter.

It is therefore the purpose of my invention to provide a grinding deviceembodying among other features, a pair of revolving grinding elementswhich are arranged to lie flat against the upper and lower sidesrespectively of the cutting edge of the band or blade to provide asmooth beveled edge, the grinding elements being 1 capable of adjustmentto dierent angles orinclinations 49 to accommodate themselves to thebevel of the blade, thereby making the cutting edge both keen and tough,which splits the leather clean and smooth, and in amore uniform degree.1

Another important characteristic of the invention resides in theprovision of a yieldable means for holding the grinding elements incontact with the 'blade under any desired degree of pressure, theyieldable 5 means functioning to absorb the thrust with a view ofallowing the grinding elements to revolve freely, theflatter beingactuated b the band passing between the same. The nature and advantagesof the invention will be better understood when the followingdescription is read' in -connection specification' f Letters Patent.

Patented oats, 191e.- I'Application led March28, 1916. Seriallim-87,820. i I i y vwith the `accompanying drawings, the in-`r` ventionresidingin the construction, combination and arrangement of partsasclaimed.-

y "In the drawings formlng part of this specication like numerals ofreference indicate similar wherein Figure 1 isa fragmentary sideelevation of the leather splitting machine,illustrated to show themanner of associating the grindparts in the several views and ing devicetherewith. Fig. 2 is a side elevavj tion of one of the grinding devicesas a unit.

4Fig. 3 is aside elevation of the invention showing vthe differentgrinding devices arranged at an .angle with respect to each other. lFlg. 4 1s a sectional view taken on line 4 4 of Fig. 3 looking in thedirection of the arrow. Fig. 5 is a vsectional view taken on line 5-5ofFig. 4.

The use of the invention in connection.,-

with a leather splitting machine sufficiently characteristic ofitsutility and ad'- mirably illustrates the invention', and will constituteone of its most useful applications. For this reason the description isaddressed to'the cooperation of the invention" with a leather splittingmachine, but itis to be understood however, that the device issusceptible for use in other connections, and

Athat such general application is contemplated `by the claims. s

Referring more particularly to the drawingsin detailk l0 indicatesgenerally a leather splitting machine of any suitable construction,embodying of course thecutting blade 11 which consists of an endlessbandtrained over the pulleys 12. `Machines'-of this character are generallyprovided with grinding' elements 13 arranged in`the manner shown in Fig.1, and which elements gri-nd the blade very fast with a resultant roughand tender edge which does inferior work. These grinding devices are tobe replaced by thel device forming the subject matter of my invention.

In the present instance the invention embodies a base 14 adapted to besecured' to the floor in any suitable manner, and from which rises astandard 15 supportingy at its upper end an iron strap 16 adapted to eX-tend across the bed plates` of the machine.

The standard l15 supports two units or grinding devices which areidentical in construction, and a brief description of.y one will suiicefor both. Y

l Secured to the stendard 15 isl a bracket 17 a pair of grindingelements slidably supthe upper and lower sides of the blade,l

means for holding said elements in different inclined positions withrespect to the blade, means for exerting pressure on said elements,\andmeans -for regulating the pressure exerted by said last 'mentionedmeans.'

3. In a grinding device, the combination with a running blade, ofavertical standard, a pair ofl revolving grinding elements mounted onsaid standard for vertical swinging movement, said elements being ar-yranged to engage respectively the upper and lower sidespoiI the blade,means'ffor exerting pressure onsaid elements, and means for regulatingthe pressure exerted by said last mentioned-means, and a combined guideand wiper for said blade secured to said standard and disposed at oneside of said elements.

4. In a grinding device, the combination with a running blade, of avertical standard, clamps secured thereto and having arms projectinglaterally from the opposite sides thereof, a grinding device mounted oneach of said arms, and including a bracket supported for verticalswinging movement, a

revolving grinding element supported on said bracket, and said elementsbeing arranged to engage respectively the upper and lower sides of theblade, means for holding the brackets in adjusted position, means forexerting pressure on said elements, and means for regulating thepressure' exerted by said last mentioned means.

5. In a grinding device, the combination with a running blade, of avertical standard, clamps adjustably mounted thereon, arms projectinglaterally from said clamps and disposed at the opposite sides of thestandard, a grinding device for each clamp, i1|- cluding a substantiallyU-shaped bracket swingingly mounted on said arm of thaclamp, a shaftsupported by said bracket, u revolving grinding element carried by tl'nlshaft, said elements being arranged to en gage respectively the upperand lower side.- of the blade, means for' holding said bracket:l inadjusted position, a spring encircling tin` shaft of 'each grindingdevice for exerting,y pressure against its grinding element, and

means for regulating the tension of said spring.

In testimony whereof Iaix my signaturey in presence of two witnesses.

GEORGE A. SWEET. Witnesses: j DoN V; PARKER, MARY BLAIR.

